Vertical angels is the answer
Answer: -4
Explanation:
f(4) = 4(4) - 20
f(4) = 16 - 20
f(4) = -4
Given:
Selling price of a machine = 7000/-
Gross loss = 20%.
To find:
The cost and gross loss.
Solution:
Let x be the cost of machine.
According to the question,




Divide both sides by 0.8.


So, the cost of the machine is 8750/-.
Now,



Therefore, the gross loss is 1750/-.